| Summary: | 碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 95 === In this study, aluminum/stainless clad metal is produced by clad-roll bonding technology. 1050 aluminum alloy and 304 stainless steel are used in this study. The contents of this study are the following discussion for clad-roll bonding technology. First, it is found out the best annealing parameter is under 13％ reduction ratio. Second, the initial clad-roll bonding mechanism is demonstrated. Simultaneously, diffusion condition in the interface and the interface microstructures are analyzed. Finally, the effects of transformation of interface microstructures on bonding strength are discussed.
Aluminum/stainless clad metal has the best bonding strength with 500℃ heated 1 hours under 13％ reduction ration from peel test. The initial clad-roll bonding mechanism of 1050 aluminum alloy and 304 stainless is by the way of aluminum stuffed into crack of stainless steel. The protruding stainless steel in the interface is the diffusion route and forms the better joint with aluminum in the annealing process, which results in the enhancement of bonding strength. The fracture surface is ductile fracture. New microstructures have grown in aluminum matrix near by the protruding stainless steel in the interface with 500℃ heated 2 hours, and they form a layer structure with 500℃ heated 3 hours. It results in decrement of bonding strength, and the fracture surface transforms into brittle fracture.
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